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[IDD #TXI-514355]: LDM problem from tornado.geos.ulm.edu



Hi Adam,

I am CCing Hsie on this reply.  Hsie, Adam Taylor is the ULM LDM/IDD
contact.  His email is:

Adam Taylor <address@hidden>

Adam wrote:
> I rebooted the machine but am still getting the error:
> 
> Aug 08 14:45:50 tornado rainbow.al.noaa.gov[717] NOTE: LDM-6 desired
> product-class: 20060808144304.649 TS_ENDT {{FNEXRAD,  "rad|pnga"},{NONE,
> "SIG=f93430bf0cf281d6bf27548a29aa46f4"}}
> Aug 08 14:45:51 tornado rainbow.al.noaa.gov[717] ERROR: Terminating due to
> LDM failure; nullproc_6 failure to rainbow.al.noaa.gov; RPC: Unable to
> receive; errno = Connection reset by peer
> 
> This error just keeps going and going....

Hsie's original message to Unidata User Support expressed the opinion
that the problem could be related to a firewall configuration:

>> I see a lot of errors in my server (rainbow.al.noaa.gov). It porbably
>> associate the firewall configuration:
>>
>> Aug 04 20:23:02 rainbow tornado.geos.ulm.edu(feed)[31829] ERROR:
>> Couldn't flush connection; nullproc_6() failure to tornado.geos.ulm.edu:
>> RPC: Unable to send; errno = Broken pipe
>> Aug 04 20:23:02 rainbow rpc.ldmd[2107] NOTE: child 31829 exited with
>> status 7
>> Aug 04 20:23:03 rainbow tornado.geos.ulm.edu(feed)[31964] NOTE: Starting
>> Up(6.4.5/6): 20060804202301.211 TS_ENDT {{FNEXRAD, "rad|pnga"}}, Alternate
>> Aug 04 20:23:03 rainbow tornado.geos.ulm.edu(feed)[31964] NOTE: topo:
>> tornado.geos.ulm.edu {{FNEXRAD, (.*)}}
>> Aug 04 20:29:02 rainbow tornado.geos.ulm.edu(feed)[31964] ERROR:
>> Couldn't flush connection; nullproc_6() failure to tornado.geos.ulm.edu:
>> RPC: Unable to send; errno = Broken pipe

So, Hsie is seeing the same problem sending to you as you are receiving
from him (not suprising).

Questions:

- what is the result of an 'ldmping' from tornado to rainbow:

  <as 'ldm'>
  ldmping rainbow.al.noaa.gov

- what happens if you run the 'notifyme' command from tornado
  to rainbow:

  <as 'ldm'>
  notifyme -vxl- -f ANY -h rainbow.al.noaa.gov -o 3600

> At my last knowlage, rainbow.al.noaa.gov was to be my primary feed for
> FNEXRAD and stokes.metr.ou.edu was my alternate.

Yes.  You should also be able to use pavan.srcc.lsu.edu as an upstream for 
FNEXRAD.

> Below is my request entries in my ldmd.conf file.  If any are in error I
> will correct then as soon as possible.

I do not see any errors in your ~ldm/etc/ldmd.conf request lines.  The only
thing that comes to mind as being possibilities are:

- /etc/hosts.allow misconfiguration (not allowing rainbow)

- an entry in /etc/hosts that defines the IP <-> name for rainbow, and your
  /etc/nsswitch.conf file says to use file definitions before DNS (which
  is the way we configure things here)

- there is something at Hsie's end (although he is not having any problems
  feeding other sites)

> Thanks, Adam

No worries.

> # Request Entries
> request UNIDATA|FSL|NMC|NPORT|GEM|NIMAGE        ".*"    pavan.srcc.lsu.edu 
> PRIMARY
> request UNIDATA|FSL|NMC|NPORT|GEM|NIMAGE        ".*"    stokes.metr.ou.edu 
> ALTERNATE
> request FNEXRAD "rad|pnga"      rainbow.al.noaa.gov PRIMARY
> request FNEXRAD "rad|pnga"      stokes.metr.ou.edu ALTERNATE
> request CRAFT   "L2-BZIP2/...." idd.unidata.ucar.edu
> request NLDN    "."     striker2.atmos.albany.edu
> request NOGAPS  "^US058GMET-GR1mdl.0058_0240.*" usgodae3.fnoc.navy.mil

Cheers,

Tom
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Ticket Details
===================
Ticket ID: TXI-514355
Department: Support IDD
Priority: Normal
Status: Closed


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